Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/37—Esters of carboxylic acids
  • A61K8/375—Esters of carboxylic acids the alcohol moiety containing more than one hydroxy group
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/46—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur
  • A61K8/463—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur containing sulfuric acid derivatives, e.g. sodium lauryl sulfate
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
  • A61K8/4906—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with one nitrogen as the only hetero atom
  • A61K8/4933—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with one nitrogen as the only hetero atom having sulfur as an exocyclic substituent, e.g. pyridinethione
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
  • A61K8/89—Polysiloxanes
  • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/02—Preparations for cleaning the hair
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/006—Antidandruff preparations

Definitions

• the present invention is related to lotion antidandruff shampoos which contain a dispersed, nonvolatile silicone phase and a pyridinethione salt and are stabilized through the use of certain long chain materials.
• Antidandruff shampoos are well known in the prior art and rely on a number of different agents for their antidandruff effectiveness. However shampooing with an antidandruff shampoo is done not only to relieve a dandruff condition but also to clean the hair.
• shampooing the hair cleans by removing excess soil and sebum.
• the shampooing process has disadvantages in that the hair is left in a wet, tangled and generally unmanageable state.
• a variety of approaches have been developed to alleviate the after-shampoo problems. These range from the inclusion of hair conditioning aids in shampoos to post-shampoo application of hair conditioners, i.e., hair rinses. Hair rinses typically work by depositing a polymeric film or other material onto the hair.
• hair rinses typically work by depositing a polymeric film or other material onto the hair.
• hair rinses must be applied in a separate step following the shampooing, left on the hair for a length of time, and rinsed with fresh water. This, of course, is time consuming and is not convenient.
• cationic conditioners may not deliver the desired level of softness desired by users.
• Materials which can provide increased softness are silicones, both those which are soluble as well as insoluble in the shampoo matrix.
• Silicones in shampoo compositions have been disclosed in a number of different publications. Such publications include U.S. Patent 2,826,551, March 11, 1958 to Geen; U.S. Patent 3,964,500, June 22, 1976 to Drakoff; U.S. Patent 4,364,837, December 21, 1982 to Pader; and British Patent 849,433, September 28, 1960 to Woolston. While these patents disclose silicone containing compositions, they also do not provide answers to all of the problems encountered in making a totally satisfactory product. One problem is that of keeping a dispersed, insoluble silicone material suspended and the total product stable.
• the present inventors have surprisingly found that when silicone and a pyridinethione salt are combined in systems as described above, the materials can both be suspended without increasing the amount of suspending agent, provide good hair conditioning and improved deposition of the pyridinethione salt.
• the present invention relates to lotion shampoo compositions comprising from about 5% to about 70% of a synthetic surfactant, about 0.01% to about 10.0% of an insoluble, nonvolatile silicone, about 0.5% to about 5.0% of a certain long chain derivative, from about 0.8% to about 4% of a pyridinethione salt and water.
• An essential component of the present compositions is a surfactant.
• the surfactant which may be selected from any of a wide variety of synthetic anionic, amphoteric, zwitterionic and nonionic surfactants, is present at a level of from about 5% to about 70%, preferably from about 10% to about 30%, most preferively from about 10% to about 22%.
• Synthetic anionic surfactants can be exemplified by the alkali metal salts of organic sulfuric reaction products having in their molecular structure an alkyl radical containing from 8 - 22 carbon atoms and a sulfonic acid or sulfuric acid ester radical (included in the term alkyl is the alkyl portion of higher acyl radicals).
• Zwitterionic surfactants can be exemplified by those which can be broadly described as derivatives of aliphatic quaternary ammonium, phosphonium, and sulfonium compounds, in which the aliphatic radicals can be straight chain or branched, and wherein one of the aliphatic substituents contains from about 8 to 18 carbon atoms and one contains an anionic water-solubilizing group, e.g., carboxy, sulfonate, sulfate, phosphate, or phos­phonate.
• anionic water-solubilizing group e.g., carboxy, sulfonate, sulfate, phosphate, or phos­phonate.
• R2 contains an alkyl, alkenyl, or hydroxy alkyl radical of from about 8 to about 18 carbon atoms, from 0 to about 10 ethylene oxide moieties and from 0 to 1 glyceryl moiety
• Y is selected from the group consisting of nitrogen, phosphorus, and sulfur atoms
• R3 is an alkyl or monohydroxyalkyl group contain­ing 1 to about 3 carbon atoms
• X is 1 when Y is a sulfur atom and 2 when Y is a nitrogen or phosphorus atom
• R4 is an alkylene or hydroxyalkylene of from 1 to about 4 carbon atoms
• Z is a radical selected from the group consisting of carbox­ylate, sulfonate, sulfate, phosphonate, and phosphate groups.
• Examples include: 4-[N,N-di(2-hydroxyethyl)-N-octadecylammonio]-butane-1-carbox­ylate; 5-[S-3-hydroxypropyl-S-hexadecylsulfonio]-3-hydroxypentane-1-­sulfate: 3-[P,P-diethyl-P-3,6,9-trioxatetradexocylphosphonio]-2-hydroxy­propane-1-phosphate; 3-[N,N-dipropyl-N-3-dodecoxy-2-hydroxypropylammonio]-propane-­1-phosphonate; 3-(N,N-dimethyl-N-hexadecylammonio)propane-1-sulfonate; 3-(N,N-dimethyl-N-hexadecylammonio)-2-hydroxypropane-1-sul­fonate; 4-[N,N-di(
• betaines are also useful in the present invention.
• betaines useful herein include the high alkyl betaines such as coco dimethyl carboxymethyl betaine, lauryl dimethyl carboxymethyl betaine, lauryl dimethyl alpha-­carboxy-ethyl betaine, cetyl dimethyl carboxymethyl betaine, lauryl bis-(2-hydroxy-ethyl) carboxy methyl betaine, stearyl bis-(2-hydroxy-propyl) carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, lauryl bis-(2-hydroxypropyl) alpha-carboxyethyl betaine, etc.
• the sulfobetaines may be repre­sented by coco dimethyl sulfopropyl betaine, stearyl dimethyl sulfopropyl betaine, lauryl dimethyl sulfoethyl betaine, lauryl bis-(2-hyroxy-ethyl) sulfopropyl betaine and the like; amido betaines and amidosulfobetaines, wherein the RCONH(CH2)3 radical is attached to the nitrogen atom of the betaine are also useful in this invention.
• amphoteric surfactants which can be used in the compositions of the present invention are those which can be broadly described as derivatives of aliphatic secondary and terti­ary amines in which the aliphatic radical can be straight chain or branched and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic water solubilizing group, e.g., carboxy, sulfonate, sul­fate, phosphate, or phosphonate.
• an anionic water solubilizing group e.g., carboxy, sulfonate, sul­fate, phosphate, or phosphonate.
• Examples of compounds falling within this definition are sodium 3-dodecyl-aminopropionate, sodium 3-dodecylaminopropane sulfonate, N-alkyltaurines such as the one prepared by reacting dodecylamine with sodium isethionate according to the teaching of U.S. Patent No. 2,658,072, N-higher alkyl aspartic acids such as those produced according to the teaching of U.S. Patent No. 2,438,091, and the products sold under the trade name "Miranol" and described in U.S. Patent 2,528,378.
• Nonionic surfactants which are preferably used in combin­ation with an anionic, amphoteric or zwitterionic surfactant, can be broadly defined as compounds produced by the condensation of alkylene oxide groups (hydrophilic in nature) with an organic hydrophobic compound, which may be aliphatic or alkyl aromatic in nature. Examples of preferred classes of nonionic surfactants are:
• the above-mentioned surfactants can be used alone or in combination in the shampoo compositions of the present invention.
• the anionic surfactants particularly the alkyl sulfates, the ethoxylated alkyl sulfates and mixtures thereof are preferred for use herein as well as the isethionates.
• Silicone fluids are a suitable nonvolatile silicone that may be used in the present compositions.
• the nonvolatile silicone fluid may be either a polyalkyl siloxane, a polyaryl siloxane, a polyalkylaryl siloxane or a polyether siloxane copolymer and is present at a level of from about 0.1% to about 10.00% preferably from about 0.5% to about 5.0%. Mixtures of these fluids may also be used and are pre­ferred in certain executions.
• the dispersed silicone particles should also be insoluble in the shampoo matrix. This is the meaning of "insoluble" as used hereinbefore and hereinafter.
• the essentially nonvolatile polyalkyl siloxane fluids that may be used include, for example, polydimethyl siloxanes with vis­cosities ranging from about 5 to 600,000 centistokes at 25°C. These siloxanes are available, for example, from the General Electric Company as the Viscasil series and from Dow Corning as the Dow Corning 200 series.
• the viscosity can be measured by means of a glass capillary viscometer as set forth in Dow Corning Corporate Test Method CTM0004, July 20, 1970.
• the viscosity ranges from about 350 centistokes to about 200,000 centistokes.
• the essentially nonvolatile polyalkylaryl siloxane fluids that may be used include, for example, polymethylphenylsiloxanes having viscosities of about 15 to 30,000 centistokes at 25°C. These siloxanes are available, for example, from the General Electric Company as SF 1075 methyl phenyl fluid or from Dow Corning as 556 Cosmetic Grade Fluid.
• the essentially nonvolatile polyether siloxane copolymer that may be used is, for example, a polypropylene oxide modified dimethylpolysiloxane (e.g., Dow Corning DC-1248) although ethylene oxide or mixtures of ethylene oxide and propylene oxide may also be used.
• a polypropylene oxide modified dimethylpolysiloxane e.g., Dow Corning DC-1248
• ethylene oxide or mixtures of ethylene oxide and propylene oxide may also be used.
• silicone gums described by Petrarch and others including U.S. Patent 4,152,416, May 1, 1979 to Spitzer, et al. and Noll, Walter, Chemistry and Technology of Silicones , New York: Academic Press 1968. Also describing silicone gums are General Electric Silicone Rubber Product Data Sheets SE 30, SE 33, SE 54 and SE 76. All of these described references are incorporated herein by reference. "Silicone gum” materials denote high molec­ular weight polydiorganosiloxanes having a mass molecular weight of from about 200,000 to about 1,000,000.
• polydimethylsiloxane examples include polydimethylsiloxane, (polydimethylsiloxane) (methyl­vinylsiloxane) copolymer, poly(dimethylsiloxane) (diphenyl) (methylvinylsiloxane) copolymer and mixtures thereof.
• the suspending agent useful in the present compositions can be any of several long chain acyl derivative materials or mixtures of such materials. Included are ethylene glycol esters of fatty acids having from about 16 to about 22 carbon atoms. Preferred are the ethylene glycol stearates, both mono and distearate, but particularly the distearate containing less than about 7% of the mono stearate. Other suspending agents found useful are alkanol amides of fatty acids, having from about 16 to about 22 carbon atoms, preferably about 16 to 18 carbon atoms. Preferred alkanol amides are stearic monoethanolamide, stearic diethanolamide, stearic monoisopropanolamide and stearic monoethanolamide stearate.
• long chain acyl derivatives include long chain esters of long chain fatty acids (e.g., stearyl stearate, cetyl palmitate, etc.); glyceryl esters (e.g., glyceryl distearate) and long chain esters of long chain alkanol amides (e.g., stearamide DEA distearate, stearamide MEA stearate).
• long chain esters of long chain fatty acids e.g., stearyl stearate, cetyl palmitate, etc.
• glyceryl esters e.g., glyceryl distearate
• long chain esters of long chain alkanol amides e.g., stearamide DEA distearate, stearamide MEA stearate.
• suspending agents are alkyl (C16 ⁇ 22) dimethyl amine oxides such as stearyl dimethyl amine oxide. If the compositions contain an amine oxide or a long chain acyl derivative as a surfactant the suspending function could also be provided and additional suspending agent may not be needed if the level of those materials are at least the minimum level given below.
• the suspending agent is present at a level of from about 0.50% to about 5.0%, preferably from about 0.5% to about 3.0%.
• the suspending agent serves to assist in suspending the silicone material and the pyridinethione salt and may give pearlescence to the product. Mixtures of suspending agents are also suitable for use in the compositions of this invention.
• Pyridinethione salts in crystal form are the antidandruff agents used in the present compositions.
• the crystals have a mean particle size in the range of from about 1 ⁇ to about 30 ⁇ .
• Such crystals are heavy metal, magnesium or aluminum salts of 1-hydroxy-2-pyridinethione which has the following structural formula in tautomeric form, the sulfur being attached to the No. 2 position in the pyridine ring.
• the metal salts represent substitution of the metal for the hydrogen of one of the tautomeric forms. Depending, of course, on the valence of the metal involved there may be more than one of the pyridinethione rings in the compound. Suitable heavy metals inlude zinc, tin, cadmium and zirconium.
• the preferred pyridinethione salt crystals used in the present invention are predominantly flat platelets which have a mean sphericity less than about 0.65, preferably between about 0.20 and about 0.65 and a median particle size of at least about 2 ⁇ diameter, expressed as the median equivalent diameter of a sphere of equal volume. It is preferred that the mean individual particle size be not greater than about 25 ⁇ , measured on the same basis. The median diameters are on a mass basis with 50% of the mass of particles falling on either side of the value given.
• the diameter of a sphere of equivalent volume for a particle can be determined by a variety of sedimentation techniques which are based on Stokes' Law for the settling velocity of a particle in a fluid. Such techniques are described in Stockham, J.D. and Fochtman, E.G., Particle Size Analysis, , Ann Arbor Science, 1978, incorporated herein by reference. The sphericity of a particle is also described by Stockham and Fochtman at page 113 as where d ⁇ is the diameter of a sphere of equivalent volume, supra, and d s is the diameter of a sphere of equivalent area. In the present invention surface area of spheres having equivalent volume distribution divided by the actual surface area of particles as measured.
• the pyridinethione salt is used at a level of from about 0.8% to about 4%, preferably from about 1.0 to 2.0%.
• Water is the last essential component of the present invention and forms the remainder of the composition. It is generally present at a level of from about 20% to about 95%, preferably from about 60% to about 85%.
• the shampoos herein can contain a variety of nonessential optional components suitable for rendering such compositions more acceptable.
• Such conventional optional ingredients are well known to those skilled in the art, e.g., preservatives such as benzyl alcohol, methyl paraben, propyl paraben and imidazolidinyl urea; cationic surfactants such as cetyl trimethyl ammonium chloride, lauryl trimethyl ammonium chloride, tricetyl methyl ammonium chloride, stearyldimethyl benzyl ammonium chloride, and di(partially hydrogenated tallow) dimethylammonium chloride; thickeners and viscosity modifiers such as a diethanolamide of a long chain fatty acid (e.g., PEG 3 lauramide), block polymers of ethylene oxide and propylene oxide such as Pluronic F88 offered by BASF Wyandotte, sodium chloride, sodium sulfate, polyvinyl alcohol, and ethyl alcohol;
• the pH of the present compositions is not critical and may be in the range of from 2 to about 10, preferably from about 4 to about 7.
• the compositions generally have a viscosity of from about 1,000 to about 12,000 at 25°C.
• All ingredients except the pyridinethione salt are mixed together and heated to about 72°C.
• the mixture is mixed thoroughly for about 10 minutes at 72°C before pumping through a high shear mill and then through a heat exchanger to cool to about 27°C.
• the pyridinethione salt is then added at 27°C and it is thoroughly mixed.
• the high shear mill is used to achieve adequate dispersion of the silicone fluid. This is achieved by having the average particle size of about 10 ⁇ or less.
• the acyl derivative is preferably crystallized into particles having an average particle size of about 10 ⁇ or less.
• a part of the surfactant is not added until after the product has cooled. This may help control the crystallization of the acyl derivative.
• compositions are used in a conventional manner for cleaning hair. From about 0.1g to about 10g of a composition is applied to hair that has been wetted, generally with water, worked through the hair and then rinsed out.
• compositions are representative of the present invention.

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• 1988
  • 1988-03-30 EP EP88302821A patent/EP0285388A3/fr not_active Withdrawn

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